Attachment to switch-stands.



' J. J. DILLON.

ATTACHMENT T0 SWITCH STANDS.

APPLICATION FILED DEC.20, 19H).

Patented Nov. 28, 1916.

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' JOHNJAIMES I DILLON, OF WEST EDMONTON, ALBERTA, CAL-NADA.

ATTACHMENT TO SWITCH-STANDS.

Specification of Letters Patent.

Patented NOV. 28, 1916.

Application filed December 20, 1915. Serial No; 67,848.

of the invention is to provide an attachment to the switch stand leverwhich will, of itself operate automatically to hold the lever in thedown position while accommodating the various depth notches appearing inthe switch stand table and which, further, is arranged so that theswitchman can quickly release the lock to raise the lever when desiringto manipulate the switch.

With the above objects in view the invention consists essentially in ahead piece secured to the switch stand crank shaft and provided with aslot, an operating lever secured to a cross pin pivotally mounted in thehead piece and having the upper end thereof provided with an eyeprotruding through the slot and. the rear side thereof fitted withratchet teeth, a trip arm permanently secured to the pin, a latchpivotally secured to the head piece and operating on the arm, a secondcross, pin pivotally mounted in the head and carried by the extendingend thereof, a dog secured to the latter cross pin, housed within thehead and engageable with the ratchet teeth, a trip bar secured to thelatter cross pin and provided with an outstanding stud and a weightpivotally mounted onthe latter pin and coiiperating with the stud andthe latch, the parts being arranged and constructed as hereinafter moreparticularly described and later pointed out in the appended claims,reference being had to the accompanying drawing in which;

Figure 1 represents a side view of the attachment, as applied on aswitchstand, with the lever down, the switch stand being shown in verticalsection. Fig. 2 represents a plan view of the attachment as applied on aswitch stand. Fig. 3 represents a side view of the attachment withthelever swung fully up. Fig. 4 is a longitudinal sectional View of theattachment with the parts in position as shown in Fig.3. Fig. 5 is avertical sectional view through the head, the

section being taken in the plane denoted by the line XX Fig. 1. Fig. 6is a side view of the parts as they appear in an intermediate positionof the operating lever.

In the drawing like characters of reference indicate corresponding partsin each figure.

1 represents a switch stand of which 2 is a hollow standard connectingthe base 3 with vthe table 4:. I The base is mounted in any suitable wayon the ground and the table is supplied with a pair of notches 5 and 6.

7 represents the switch stand crank shaft which is rotatably mounted inthe table and the base piece and to the crank of which is connected theusual switch bar 8.

The above parts are of ordinary construction and form no part of myinvention.

My attachment is applied on the shaft 7 adjacent the table, and is nowdescribed in detail. It comprises a head piece 9 having one end fastenedpermanently by means of a key 10 to the shaft 7 and arranged to operateover the table with the free end thereof overhanging the back edge ofthe table,

end thereof entering the housing and perma nently secured to the pin 13.The upper end of the lever projects, in the down position of the lever,through the slot and is provided with an eye 15, while the rear facethereof is fitted with a series of ratchet teeth 16 on which a dog 17 isdesigned to operate, the dog being'normally contained within the housingand being fastened permanently to a second cross pin 18 pivotallymounted in the sides of the head piece.

19 is a trip bar permanently secured to the crosspin 18 and fitted withan outstanding stud 20.

21 is a weight pivotally mounted on the outer end of the pin 18 andadjacent the trip bar. This weight is supplied with a notch 21" designedto receive the stud 20, and is fitted with a projecting lug 21 Thearrangement of the latter parts is such that when the lever is'down theweight operates on the stud to throw the dog in against the teeth on theoperating lever, in which position it is shown in Fig. 1 of the drawing.According to this it is obvious that when the lever is down it isautomatically held locked by the action of the weight.

22 is a horizontally disposed trip arm permanently secured to theprojecting end of the pin 13, on which it turns.

4 23 is a latch pivotally secured to the side of the head piece, asshown at 24, and having the free end thereof resting normally on theupper edge of the trip arm. The latch is supplied with an outstandingcatch 25, arranged to catch the weight when the same is thrown over torelease the dog.

I A padlock 26 is supplied to lock the lever so that it. cannot bemanipulated without undoing the padlock with a key. The padlock isattached to the eye 15 when the lever is in the down position, andprevents the movement of the lever as the head piece is fitted with anenlargement 9 to catch the padlock.

In order that the device may be better understood, 1 will now describeits operation, assuming initially, that the parts are in the position asshown in Fig. l of the drawing. iVhen a switchman desires tomanipulatethe switch rail (not shown, but attached to the bar 8), he first removesthe padlock and then swings the weight over byhand until it strikes andrests on the catch 25. As the weight turns over, the lug 21 is designedto hit the stud and cause the stud to swing the trip bar andconsequently effeet the outward swinging of the dog clear of the teethof the lever. The operating lever can then be swung upwardly and as itswings up it turns the, trip arm which raises the" latch and causes theweight to be swung back until. it is caught by the stud. It is hereexplained that the weight is caught by the stud before the lever reachesthe hori-, zontal position, (as shown in Fig. 3 of the drawing), andthat although the weight, in this position, would cause the dog to'swingin against the lever, still the dog does not at this time catch on thelever as it engages with said lever at a point where there are no teeth.For convenience in understanding this particular part of the action, theparts have been shown in Fig. 6, in the position they occupy when the.lever is partway up and the dog is traveling on the smooth face ofthelever. WVhen the lever has been brought finally to the upper position,the shaft 7 can be turned to throw the weight as desired. The lever isthen released and it drops of itself, by gravity,into the presentedslot. As it drops the weight swings back to the initial position withthe result that the dog travels up the teeth and locks the lever in thatfinal position.

From the above it is obvious that the lever is at all times positivelylocked against outward swing from the notch in which it I the crankshaft and the table thereof, hav-v mg suitably disposed side notchestherein, of a head piece permanently secured to the crank shaft andoperating over the table, a downwardly extending pivoted operating leversecured to the head piece and normally entering one of the notches, saidlever having the rear face thereof fitted with a series of ratchetteeth, and a releasable dog pivotally secured to the head piece andnormally engaging with the teeth of the lever and holding the levernormally in closed position within the notch.

2. The combination with a switch stand,

the crank shaft and the table thereof, having suitably disposed sidenotches therein, of a head piece permanently secured to the crank shaftand operating over the table, a downwardly extending pivoted operatinglever secured to the head piece and normally entering one of thenotches, saidlever having the rear face thereof fitted with a series ofratchet teeth, a dog pivotally secured to the head piece and gravityoperated means for retaining the dog normally in engagement with theteeth of the lever to hold the leverin the down position.

The combination'witha switch stand, the crank shaft and the tablethereof, havsuitably disposed side notches therein,

of a head piece permanently secured to the and engaging with the studand designed mg to effect, through the trip bar, the holding of the dognormally against the teeth of the lever.

4:. The combination with a switch stand, the crank shaft and the tablethereof, having suitably disposed side notches therein, of a head piecepermanently secured to the crank shaft and operating over the table,adownwardly extending pivoted operating lever secured to the head pieceand normally entering one of the notches, said lever having the rearface thereof fitted with a series of ratchet teeth, a cross pinrotatably mounted in the head, a dog housed within the head and securedto the cross pin and designed to operate on the teeth of the lever, atrip bar permanently secured to the cross pin, a stud extending from thebar and a weight mounted 011 the cross pin and provided with a slotnormally receiving the stud and with a lug designed to engage the studin the swinging of the weight.

5. The combination with a switch stand, the crank shaft and the tablethereof, having suitably disposed side notches therein,

' of a head piece operating over the table and permanently secured tothe upper end of the crank shaft, a cross pin pivotally mounted in theextending end of the head, an operating lever secured to the pin andhaving the upper end thereof housed within the head and fitted on therear side with a series of ratchet teeth and with the forward sidenormally entering one of the notches in the table, a second cross pinrotatably mounted in the head, a dog secured to the latter pin, a tripbar secured to the latter pin, a stud projecting outwardly from the bar,a weight pivotally mounted on the latter pin and provided with a slotnormally receiving the stud and with a projecting lug, said weight beingdesigned, with the stud in the slot, to hold the dog engaged with theratchet teeth of the lever and when turned on the pin to effect, throughthe lug, the swinging of the secured to the head and bearing normally onthe arm and provided with a catch to receive the weight in the finalupswung position thereof.

6. The combination with a switch stand, the crank shaft and the tablethereof, having suitably disposed side notches therein, of a head pieceoperating over the table and permanently secured to the upper end of thecrank shaft, a cross pin pivotally mounted in the extending end of thehead, an operating lever secured to the pin and having the upper endthereof housed within the head and fitted on the rear side with a seriesof ratchet teeth and with the forward side normally entering one of thenotches in the table, a second cross pin rotatably mounted in the head,a dog secured to the latter pin, a trip bar secured to the latter pin, astud projecting outwardly from the bar, a weight pivotally mounted onthe latter pin and provided with a slot normally receiving the stud andwith a projecting lug, said weight being designed, with the stud in theslot, to hold the dog engaged with the ratchet teeth of the lever andwhen turned on the pin to effect, through the lug, the swinging of thestud and the release of the dog from the teeth, means carried by thehead for catching the weight, when swung upwardly, to release the dogand means actuated by the lever in swinging outwardly to raise the catchand receive the weight with the stud in the slot.

Signed at Edmonton this 4th day of October, 1915.

JOHN JAMES DILLON.

In the presence of- WM. SHORT, B. LAIDLAW.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

